Auto-door lock



1, w. CARLSON. AUTO DOOR LOCK. APPLICATION FILED DEC.29, [919.

8 14 uem to:

Patented Mar; 22

JOHN W. GARLSON, 0F JAMESTOWN, NEW YORK.

AUTO-DOOR LOCK.

Specification of Letters Patent. Patented Mar. 22, 1921.

Application filed. December 29, 1919. Serial No. 348,208.

To aZZ "wit-0m it may concern Be it known that 1 JOHN W. CARLsoN, a citizen of the United States, residin at the city of Jamestown, in the county of Chautauqua and State of New York, have invented certain new and useful Improvements in Auto-Door Locks, of which the following, taken in connection with the accompanying drawings, is a specification.

The invention relates to looks which are used upon doors in exposed positions where they are liable to catch upon the clothing or other articles, as, for example upon the doors of automobiles and similar vehicles; and the improvement consists in providing a simple form of bolt latch which is quickly and easily releasable by means of manual pressure upon the end of a lever, the remainder of the lever and lock mechanism being concealed; and the invention consists in the novel features and combinations hereinafter set forth and claimed.

In the drawings, Figure 1 is a perspective view of the inner side of a closed door of an automobile, showing the end of the concealed lock lever ready for actuation by manual pressure. Fig. 2 is a perspective view of the same, the cover being removed to show the look as mounted in the frame of a door, the door being removed from the surrounding portion of the body of the auto mobile. Fig. 3 is an elevation of the lock or latch, the side plate of the casing being removed to show the construction and arrangement of the same; and Fig. 4; is a sectional view at line H in Fig. 3, the movement of the actuating lever being shown in dotted outline. Fig. 5 is a detail perspective view of a modification of the bell crank portion of the latch or look. Fig. 6 is an elevation of the latch plate for the latch bolt.

Like characters of reference refer to corresponding parts in the several views.

The numeral 10 designates the casing and support of the latch or look which is ar ranged in the usual lock or latch form for in sertion in the door 11, which is shown in this case for an automobile, the body 12 extending around the same with the hand rail 13 across the upper edge of the door 11.

The improved lock or latch consists of a bolt 14 which is pivotally attached at its innor end to the lower end of an arm 26 of the bell crank 15 at 16. The bell crank lever 15 is pivotally attached within the casing 10 at 17, and its arm 23 extends out beneath the angular lower end 21 of the actuating lever 18, which actuating lever is pivotally mounted in a bracket piece 19 midway of its length.

The lever has suflicient length to extend up to within a short distance of the hand rail 13 so that by placing the hand on said hand rail, the upper end 20 of the lever 18 may be quickly and easily pressed, thereby actuating the lock or latch bolt 1% withdrawing the same in the following manner: The lower end 21 of the lever 18 is turned at an angle, and the upper side 22 of the arm 23 of the bell crank 15 is shaped at the same angle of inclination as the face of the angle 21 of said lever 18, so that when the upper end 20 of the lever 18 is pressed in wardly, said lower end 21 is moved outward, thereby pressing downward on the arm 23 of the bell crank 15 and drawing the latch bolt 11 inward and withdrawing said bolt 1a from the latch plate 27.

In order to make the action of the lever 18 and bell crank 15 as easy as possible, a small roller 24 may be provided on the arm 23 to receive the pressure of the inclined angular end 21 of said lever 18. A spring 25 is attached at one end to the casing 10 and at the other to the arm 26 of the bell crank 15 to normally draw or return the latch bolt 141 into the extended position.

It is apparent that the latch is simple and positive in its action with no exposed parts, yet powerfully and quickly attainin its purpose in the actuation of the spring latch bolt 14. It is also apparent that said spring latch bolt 14 will snap shut over a common latch plate 27 as shown in Fig. 6, and hold firmly in the opening 28 the same as any latch bolt construction.

I claim as new:

1. In a latch, a casing having a back which extends upwardly beyond the casing top, said back extension and the top being formed with an opening, a bolt in the easing, an operating member for the bolt having a horizontal part which underlies the part of the said opening that is formed in the casing top, and a vertical lever pivoted to the upper end of the back extension and having its lower end extending rearwardly at an incline and projecting through the parts of the opening in the top and the back extenslon and engaged with said horizontal part of the operating member.

2. In a latch, a casing, a bolt therein, an Wardly and toward the inner side of the 10 operating member for the bolt, a vertical casing.

lever having its lower end extending rear- In testimony whereof I have aflixed my Wardly and having the lower edge of sald signature in the presence of two witnesses.

lower end arran ed at an lnchne to engage JOHN M CARLSON with and actuate the operating member, said lever being pivoted so that upon inward lVitnesses:

movement of the upper end thereof the high G. V. SWANSON, part of the inclined lower end will move up- E. L. BUCHANAN. 

